Different lights each time. Down to one original lens.... Hoping the replacements don't have the same issues.
Had the same problem with my bullet turn signals on the '05 SEEG. After replacing the lenses just to have the replacements also fail with one tab breaking, I gave up and installed them with a thin bead of clear silicone sealer, leaving an open space at the bottom for drainage. They've been fine ever since, and when I had to replace a bulb a good twist broke the silicone loose.
I've always assumed it was a combination of a poorly manufactured lens and the fit to the housing. The tabs that broke on mine always seemed to be the same location btw, indicating it was more of a lens problem than a housing problem. See if you can find a mold number on the lenses that broke, and if you do find a common number for the broken ones, make sure when you buy the next replacement that you don't accept one with that same mold number.
Jerry